SEC ownership of PREFORMED LINE PRODUCTS CO

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000080035.

Comparable stake leader

WASATCH ADVISORS LP

Disclosed value leader

HighTower Advisors, LLC

Comparable rows

50/50

Latest evidence

04 Sep 2026

Top shareholders Insider holders Latest transactions
Public ticker
PLPC on Nasdaq
Parsed ownership sources
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder
WASATCH ADVISORS LP
Ranking: Comparable ownership first, then disclosed value
Ownership snapshot CIK-linked ownership evidence from parsed SEC filings. 3 signals
Comparable ownership rows
50 of 50
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder
WASATCH ADVISORS LP
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date
04 Sep 2026
Freshness: Most recent filing date in this holder set
Issuer Names, identifiers, and filing context for this profile. 2 identity fields
Issuer CIK
0000080035
Issuer location
Cleveland, OH

Ownership snapshot

Top shareholders of PREFORMED LINE PRODUCTS CO (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
WASATCH ADVISORS LP
Disclosed value leader
HighTower Advisors, LLC
Comparable rows
50/50
Latest evidence
04 Sep 2026
13F 13D/G 3/4/5 Lead comparable stake: 7.7% 13D/G row: WASATCH ADVISORS LP Showing 1-8 of 50 holder rows.

Quick read

WASATCH ADVISORS LP leads the comparable SEC ownership view at 7.7%.

50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens WASATCH ADVISORS LP's linked filing trail.
Comparable ownership Top 5
WASATCH ADVISORS LP 7.7%
DIMENSIONAL FUND ADVISORS LP 4.5%
ROYCE & ASSOCIATES LP 3.5%
Robert G. Ruhlman 18%
Randall M. Ruhlman 12%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 50 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
WASATCH ADVISORS LP
13F 13D/G
Company
13F 13D/G
7.7%
from 13D/G
$154,931,796
377,367 shares
 — 30 Jun 2026
DIMENSIONAL FUND ADVISORS LP
13D/G 13F
Company
13D/G 13F
4.5%
$89,656,381
218,377 shares
 -$36,584,395 30 Jun 2026
ROYCE & ASSOCIATES LP
13F 13D/G
Company
13F 13D/G
3.5%
from 13D/G
$28,563,480
69,572 shares
 — 30 Jun 2026
Robert G. Ruhlman
3/4/5
Executive Chairman, Director, 10%+ Owner
3/4/5
18%
$316,724,709
858,868 shares
 — 09 Jun 2026
Randall M. Ruhlman
3/4/5
10%+ Owner
3/4/5
12%
$242,375,698
593,378 shares
 -$2,095,706 04 Sep 2026
Maegan Adams Ruhlman Cross
3/4/5
Director
3/4/5
0.5%
$9,027,857
24,481 shares
 — 09 Jun 2026
Michael E. Gibbons
3/4/5
Director
3/4/5
0.36%
$2,760,799
17,569 shares
 — 01 Jul 2025
R. Steven Kestner
3/4/5
Director
3/4/5
0.13%
$1,250,323
6,406 shares
 — 15 Dec 2025
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Net insider flow leans to selling over the last 12 months. Net value: -$3,009,746.

Buys
$0
Insiders: 0
Sells
$3,009,746
Insiders: 2
Net
-$3,009,746
Shares: -7,142
Window
Last 12 months
4 rolling buckets
Buy value Sell value
Shares: 0 Shares: 7,142
Window (months) Buy shares Sell shares Buy value Sell value Net value
0-3 0 7,142 $0 $3,009,746 -$3,009,746
3-6 0 0 $0 $0 $0
6-9 0 0 $0 $0 $0
9-12 0 0 $0 $0 $0

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-20 of 24 reporting-owner rows connected to PREFORMED LINE PRODUCTS CO. Open a relationship link for the CIK-to-CIK filing trail.

Rows
24
Largest Forms 3/4/5 holder
Robert G. Ruhlman
Net 12M change
-$3,009,746
Latest report
04 Sep 2026
Name Relationship Holdings Value Past Year Net Change Change % Valuation Report Date
Robert G. Ruhlman Executive Chairman, Director, 10%+ Owner $316,724,709 Mixed 09 Jun 2026
Randall M. Ruhlman 10%+ Owner $242,375,698 -$2,095,706 -0.86% Mixed 04 Sep 2026
Jon Ryan Ruhlman President, Director $9,431,103 Mixed 11 Jun 2026
Maegan Adams Ruhlman Cross Director $9,027,857 Mixed 09 Jun 2026
Dennis F. McKenna Ceo $7,492,686 Mixed 10 Mar 2026
Caroline Saylor Vaccariello General Counsel&Corp Secretary $5,529,006 Mixed 10 Mar 2026
Andrew S. Klaus Cfo $5,346,256 Mixed 12 Jun 2026
William H. Haag III V.P.-International Operations $4,788,698 Mixed 10 Aug 2023
Michael E. Gibbons Director $2,760,799 Mixed 01 Jul 2025
Glen E. Corlett Director $2,303,652 -$914,040 -28% Median 05 Aug 2026
John J. Olenik VP-Research & Engineering $1,913,308 Mixed 10 Jun 2026
Assaad A. Morcos VP, US Manufacturing $1,427,745 Mixed 10 Jun 2026
R. Steven Kestner Director $1,250,323 Mixed 15 Dec 2025
Timothy O'Shaughnessy V.P. Human Resources $1,074,556 Mixed 10 Jun 2026
Richard R. Gascoigne Director $802,384 Mixed 15 Dec 2025
C. Sunkle David Director $562,446 Mixed 10 Mar 2026
Matthew D. Frymier Director $440,130 Mixed 15 Dec 2025
John M. Hofstetter Executive Vice President $347,484 Mixed 08 Jun 2026
William Koh VP of Asia Pacific Region $84,130 Mixed 04 Feb 2026
Third Restatement of Barbara P. Ruhlman Trust Agreement, dated November 20, 2008 10%+ Owner Mixed 29 Aug 2024

Recent insider transactions for PREFORMED LINE PRODUCTS CO

Showing up to 300 recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % SEC-reported value SEC-reported price Shares Shares owned Date Ownership
Randall M. Ruhlman PLPC Common shares, $2 par value Sale -1.11% $2,038,900 $407.78 -5,000 446,609 08 Sep 2026 Direct
Randall M. Ruhlman PLPC Common shares, $2 par value Sale -0.03% $56,806 $400.04 -142 451,609 04 Sep 2026 Direct
Glen E. Corlett PLPC Common shares, $2 par value Sale -100% $914,040 $457.02 -2,000 0 05 Aug 2026 by IRA
Randall M. Ruhlman PLPC Common shares, $2 par value Other 2.25% 9,121 414,321 03 Aug 2026 by trust
Randall M. Ruhlman PLPC Common shares, $2 par value Other -1.98% -9,121 451,751 03 Aug 2026 Direct
Andrew S. Klaus PLPC Common shares, $2 par value Disposed to Issuer -4.36% -635 13,918 12 Jun 2026 Direct
Jon Ryan Ruhlman PLPC Common shares, $2 par value Disposed to Issuer -26.4% -1,000 2,784 11 Jun 2026 Direct
Assaad A. Morcos PLPC Common Shares, $2 par value per share Disposed to Issuer -100% -1,000 0 10 Jun 2026 Direct
Assaad A. Morcos PLPC Common Shares, $2 par value per share Options Exercise 1,000 1,000 10 Jun 2026 Direct
Assaad A. Morcos PLPC Employee stock option (right to buy) Options Exercise -21% -1,000 3,750 10 Jun 2026 Direct
Timothy O'Shaughnessy PLPC Common shares, $2 par value Disposed to Issuer -18.8% -750 3,250 10 Jun 2026 Direct
John J. Olenik PLPC Common shares, $2 par value Disposed to Issuer -13.3% -1,000 6,506 10 Jun 2026 Direct
Robert G. Ruhlman PLPC Common shares, $2 par value Gift -12.6% -36,000 249,673 09 Jun 2026 Direct
Maegan Adams Ruhlman Cross PLPC Common Shares, $2 par value per share Gift 18,000 18,000 09 Jun 2026 by Trust
Jon Ryan Ruhlman PLPC Common Shares, $2 par value per share Gift 18,000 18,000 09 Jun 2026 by Trust
John M. Hofstetter PLPC Common shares, $2 par value Disposed to Issuer -100% -3,446 0 08 Jun 2026 Direct
Robert G. Ruhlman PLPC Common shares, $2 par value Disposed to Issuer -0.87% -2,500 285,673 13 Mar 2026 Direct
Glen E. Corlett PLPC Common shares, $2 par value Disposed to Issuer -6.65% -400 5,611 12 Mar 2026 Direct
John J. Olenik PLPC Common shares, $2 par value Disposed to Issuer -100% -752 0 12 Mar 2026 by 401(k) plan
Assaad A. Morcos PLPC Common Shares, $2 par value per share Disposed to Issuer -100% -1,750 0 10 Mar 2026 Direct
Assaad A. Morcos PLPC Common Shares, $2 par value per share Options Exercise 1,750 1,750 10 Mar 2026 Direct
Assaad A. Morcos PLPC Employee stock option (right to buy) Options Exercise -26.9% -1,750 4,750 10 Mar 2026 Direct
C. Sunkle David PLPC Common shares, $2 par value Disposed to Issuer -49.9% -1,600 1,607 10 Mar 2026 Direct
Timothy O'Shaughnessy PLPC Common shares, $2 par value Disposed to Issuer -23.7% -1,244 4,000 10 Mar 2026 Direct
Caroline Saylor Vaccariello PLPC Common shares, $2 par value Disposed to Issuer -44.8% -1,547 1,908 10 Mar 2026 Direct
Jon Ryan Ruhlman PLPC Common shares, $2 par value Disposed to Issuer -34.6% -2,000 3,784 10 Mar 2026 Direct
John M. Hofstetter PLPC Common shares, $2 par value Disposed to Issuer -63.5% -6,000 3,446 10 Mar 2026 Direct
Dennis F. McKenna PLPC Common shares, $2 par value Disposed to Issuer -100% -7,887 0 10 Mar 2026 Direct
Andrew S. Klaus PLPC Common shares, $2 par value Disposed to Issuer -14% -2,365 14,553 10 Mar 2026 Direct
William Koh PLPC Restricted stock units Award 407 407 04 Feb 2026 Direct
Assaad A. Morcos PLPC Restricted stock units Award 407 407 04 Feb 2026 Direct
Caroline Saylor Vaccariello PLPC Common shares, $2 par value Tax liability -27% -1,278 3,455 04 Feb 2026 Direct
Caroline Saylor Vaccariello PLPC Common shares, $2 par value Award 47.2% 1,517 4,733 04 Feb 2026 Direct
Caroline Saylor Vaccariello PLPC Restricted stock units Award 564 564 04 Feb 2026 Direct
John M. Hofstetter PLPC Common shares, $2 par value Tax liability -13.1% -1,424 9,446 04 Feb 2026 Direct
John M. Hofstetter PLPC Common shares, $2 par value Award 18.5% 1,696 10,870 04 Feb 2026 Direct
John M. Hofstetter PLPC Restricted stock units Award 591 591 04 Feb 2026 Direct
John J. Olenik PLPC Common shares, $2 par value Tax liability -11.6% -987 7,506 04 Feb 2026 Direct
John J. Olenik PLPC Common shares, $2 par value Award 15.8% 1,160 8,493 04 Feb 2026 Direct
John J. Olenik PLPC Restricted stock units Award 441 441 04 Feb 2026 Direct
Timothy O'Shaughnessy PLPC Common shares, $2 par value Tax liability -16.6% -1,041 5,244 04 Feb 2026 Direct
Timothy O'Shaughnessy PLPC Common shares, $2 par value Award 24.3% 1,227 6,285 04 Feb 2026 Direct
Timothy O'Shaughnessy PLPC Restricted stock units Award 493 493 04 Feb 2026 Direct
Andrew S. Klaus PLPC Common shares, $2 par value Tax liability -8.12% -1,496 16,918 04 Feb 2026 Direct
Andrew S. Klaus PLPC Common shares, $2 par value Award 10.7% 1,785 18,414 04 Feb 2026 Direct
Andrew S. Klaus PLPC Restricted stock units Award 693 693 04 Feb 2026 Direct
Dennis F. McKenna PLPC Common shares, $2 par value Tax liability -22% -2,223 7,887 04 Feb 2026 Direct
Dennis F. McKenna PLPC Common shares, $2 par value Award 36% 2,677 10,110 04 Feb 2026 Direct
Robert G. Ruhlman PLPC Common shares, $2 par value Tax liability -2.01% -5,924 288,173 04 Feb 2026 Direct
Robert G. Ruhlman PLPC Common shares, $2 par value Award 4.77% 13,386 294,097 04 Feb 2026 Direct
* marks a reported price that did not pass the local price check.
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